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94 lines
2.9 KiB
Markdown
94 lines
2.9 KiB
Markdown
## 将AWTK移植到STM32f103ze裸系统
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AWTK的可移植性很高，在移植时只需要实现平台初始化、lcd和mainloop三个方面的东西。本文以STM32f103ze为例介绍移植AWTK到新平台的过程。
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### 一、平台初始化
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除了基本的libc函数外，AWTK对平台没有特别要求，只需要get\_time\_ms和sleep\_ms两个函数以及一块内存。我们使用systick来实现get\_time\_ms和sleep\_ms两个函数，裸系统上只需加入src/platforms/raw/sys\_tick.c并初始化sys\_tick即可。
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```
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#include "sys.h"
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#include "base/mem.h"
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#include "base/timer.h"
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void systick_init(void) {
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u8 fac_us = 0;
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u16 fac_ms = 0;
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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fac_us = SystemCoreClock / 8000000;
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fac_ms = (u16)fac_us * 1000;
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SysTick->CTRL |= SysTick_CTRL_TICKINT_Msk;
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SysTick->LOAD = fac_ms;
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
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}
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static uint32_t s_heam_mem[2048];
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ret_t platform_prepare(void) {
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tk_mem_init(s_heam_mem, sizeof(s_heam_mem));
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return RET_OK;
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}
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```
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> 参考：awtk-port/platform.c
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### 二、实现lcd
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lcd\_t接口提供基本的显示功能，AWTK提供基于寄存器和基于framebuffer两种缺省实现，在此基础上实现自己的lcd\_t接口非常方便。
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stm32f103ze使用基于寄存器的lcd的缺省实现，只需要提供set\_window\_func和write\_data\_func两个函数/宏即可。这里直接使用了TFT\_SetWindow和TFT\_WriteData两个函数。
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```
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#include "gui.h"
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#include "lcd_driver.h"
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#include "base/mem.h"
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#include "lcd/lcd_reg.h"
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typedef uint16_t pixel_t;
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#define set_window_func TFT_SetWindow
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#define write_data_func TFT_WriteData
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#include "blend/rgb565.inc"
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#include "blend/pixel_ops.inc"
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#include "lcd/lcd_reg.inc"
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```
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> 参考 awtk-port/lcd\_stm32\_raw.c
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### 三、实现main\_loop
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main\_loop主要负责事件分发和绘制这个不断循环的过程。main\_loop\_raw.inc里实现了裸系统main\_loop的基本功能，在移植时加上输入事件的的分发即可：
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```
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ret_t platform_disaptch_input(main_loop_t* l) { return RET_OK; }
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static lcd_t* platform_create_lcd(wh_t w, wh_t h) { return lcd_reg_create(w, h); }
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void TIM3_IRQHandler(void) {
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if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {
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TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
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if (TOUCH_Scan() == 0) {
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main_loop_post_pointer_event(main_loop(), TRUE, TouchData.lcdx, TouchData.lcdy);
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} else {
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main_loop_post_pointer_event(main_loop(), FALSE, TouchData.lcdx, TouchData.lcdy);
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}
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}
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}
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#include "main_loop/main_loop_raw.inc"
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```
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> 参考 awtk-port/main\_loop\_stm32\_raw.c
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注：目前以[普中科技STM32F103ZET6开发实验板](https://item.taobao.com/item.htm?spm=a230r.1.14.1.50a130e8TMKYMC&id=558855281660&ns=1&abbucket=5#detail) 为载体移植，其它开发板应该差不多。
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完整项目和源码请参考：[awtk-stm32f103ze-raw](https://github.com/zlgopen/awtk-stm32f103ze-raw)
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